The flow coefficient of a device is a relative measure of its efficiency at allowing fluid flow. It describes the relationship between the pressure drop across an orifice valve or other assembly and the corresponding flow rate .

Calculate flow coefficients for the design of control valves - Imperial units. With the flow coefficients capacities of valves at different sizes, types and manufacturers can be compared. The flow coefficients are in general determined experimentally and express the. The flow factor - Kv - is also commonly used with capacity in SI-units.

The Flow Coefficient (Cv) is a measure of the flow capacity of a valve, defined as the volume of water at 60°F (in US gallons) that will flow through it per minute with a pressure drop of 1 psi across the valve. What does a higher flow coefficient mean?

Valve Flow Coefficient (Cv) is a valve’s capacity for a liquid or gas to flow through it. It is technically defined as “the volume of water at 60°F (in US gallons) that will flow through a valve per minute with a pressure drop of 1 psi across the valve.”

Comparing flow coefficients Cv to flow factors Kv. The flow coefficient - Cv - or the flow factor - Kv - are commonly used to specify capacities of control valves. Control Valve terminology, bodies, trim, flow characteristics, Cv and Kv sizing, noise, actuators, positioners and more.

2024年8月28日 · The valve flow coefficient measures the capacity of a valve to let fluids pass through it. Technically, the definition of the C v flow coefficient is: the volume of water at 60°F (in US gallons) that will flow through a valve per minute with a pressure drop of 1 …

2025年1月8日 · The valve flow coefficient is the flow capacity of a valve. It describes the valve’s efficiency in allowing the flow of fluid through it. This makes it a vital indicator of a valve’s performance.

Cv for liquids is the volume of 68°F water in U.S. gallons per minute that passes through a valve at a pressure drop of 1 PSI. Flow for a given Cv is typically calculated from the following formula. The formula above utilizes a conversion factor of 62.4 which is the density of water in lbs/ft3.

2019年1月28日 · Cv — the coefficient of flow — is one standard for expressing the flow capacity of devices used in a pneumatic system. Many manufacturers around the world have adopted Cv as the standard value to express the flow capacity of their components.

The flow coefficient, which describes the flow capacity of a valve, is an empirically determined constant equal to the valve's flow capacity in U.S. gallons per minute of water at 60 °F when a pressure drop of 1 psi exists across the valve in its most wide-open position.